Results 241 to 250 of about 1,781,084 (278)

On the Achievable Rate Region of NOMA Under Outage Probability Constraints

IEEE Communications Letters, 2019
In this letter, we study the outage achievable rate region of non-orthogonal multiple access (NOMA), which is defined as the achievable rate region when all users are required to satisfy their outage probability constraints. First, we formally define the
Zihan Tang, Jun Wang, Jintao Wang, Jian Song   +3 more
semanticscholar   +1 more source

Outage probability analysis of heterogeneous relay networks

2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018
The heterogeneous wireless network is considered to be a cornerstone of the system architectural design of the next cellular network generations such as the fifth generation (5G) to alleviate the imminent capacity crunch. With the heterogeneity of the 5G cellular network, it is inevitable to have different statistical channel models within the same ...
Ahmed Wagdy Shaban, Mohamed Oussama Damen   +1 more
openaire   +1 more source

On the Outage Probability Optimization in MISO Rician Channels

2009 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications, 2009
We address the optimization issue of the outage probability in Rician block fading channels with $N$ transmit antennas and $1$ receive antenna. It is already known that the eigenvectors of the covariance matrix of the transmit signal that minimizes the outage probability are the normalized mean vector of the Rician channel and $N-1$ orthonormal vectors
Eric A. Bouton, Nassar Ksairi, Philippe Ciblat, Pascal Bianchi, Walid Hachem   +4 more
openaire   +1 more source

On the Outage Probability of Cooperative 5G NOMA at Intersections

IEEE Vehicular Technology Conference, 2019
In this paper, we study cooperative vehicular communications (VC) transmission schemes using non-orthogonal multiple access scheme (NOMA) at intersections, in the presence of interference, when two destination nodes are involved.
B. Belmekki, A. Hamza, B. Escrig
semanticscholar   +1 more source

Tight Upper Bound on the Outage Probability of QSTBC

IEEE Communications Letters, 2006
Recently, the statistical properties of the equivalent channel representation of a multiple-input-multiple output (MIMO) system employing rate one quasi-orthogonal space-time block codes (QSTBC) for n T=2n, nges2 transmit antennas was characterized. It was shown, that these QSTBC were capable of achieving a significant fraction of the outage mutual ...
Aydin Sezgin, Eduard A. Jorswieck
openaire   +1 more source

Outage Probability and Optimal Cache Placement for Multiple Amplify-and-Forward Relay Networks

IEEE Transactions on Vehicular Technology, 2018
We present a novel framework for analyzing and optimizing the outage performance of a multiple amplify-and-forward relay network, where $N$ relays, each with finite cache capacity, are deployed to assist the transmission from a base station equipped with
Lisheng Fan, Nan Zhao, Xianfu Lei, Qingchun Chen, Nan Yang, G. Karagiannidis   +5 more
semanticscholar   +1 more source

Improving Secrecy Outage Probability with Symbol Extension

2014 IEEE 79th Vehicular Technology Conference (VTC Spring), 2014
This paper reveals symbol extension is capable of improving secrecy performance in the multiple-input single-output (MISO) wiretap channel. We propose a symbol extension scheme jointly with the existing beamforming and artificial noise generation strategy to exploit the time variation of fading channel.
Cong Zhang 0003, Tiejun Lv, Ruohan Cao, Hui Gao 0001   +3 more
openaire   +1 more source

Outage Probability Constrained MIMO-NOMA Designs Under Imperfect CSI

IEEE Transactions on Wireless Communications, 2018
Non-orthogonal multiple access (NOMA) has been recognized as a promising multiple access scheme to be used in fifth-generation wireless networks.
Jingjing Cui, Z. Ding, P. Fan
semanticscholar   +1 more source

Outage Probability for Opportunistic Relaying on Multicell Environments

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009
Opportunistic relaying has been shown to be an effective and practical method for implementing the cooperative diversity. However, most of previous works have focused on single cell environments and ignored the effects of interference from neighboring cells.
Dongwoo Lee, Jae Hong Lee
openaire   +1 more source

Modeling UpLink Power Control with Outage Probabilities

2007 IEEE 66th Vehicular Technology Conference, 2007
We investigate models for uplink interference in wireless systems. Our models account for the effects of outage probabilities. Such an accounting requires a nonlinear, even nonconvex model, since increasing interference at the receiving base station increases both mobile transmit power and outage probability, and this results in a complex interaction ...
Kenneth L. Clarkson, Georg K. Hampel, John D. Hobby   +2 more
openaire   +1 more source